RGUHS Nat. J. Pub. Heal. Sci Vol: 14 Issue: 4 eISSN: pISSN
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Manonmani Arumugama , Balashanmugam Baskaranarayananb , Karunanidhic , Dinesh Babud
a Private practitioner, Bengaluru, bProfessor, Department of Orthodontics and Dentofacial Orthopedics, c Tamil Nadu Government Dental College and Hospital, Chennai, India, cDean, Madha Dental College and Hospital, Kundrathur, Chennai, d Assistant Professor, ICH&HC,Chennai
Abstract
The aim of the study was to compare the arch widths and arch forms in different types of malocclusions in Chennai population using 3D Laser scanning system. The study was conducted on 90 subjects at Department of Orthodontics, Tamil Nadu Government Dental College & Hospital, Chennai. The subjects had no previous history of orthodontic treatment and aged between 16-23 years. The three groups: class-I, class-II division 1 and class-III consisted of 30 samples per group with 15 males and 15 females each.
The results showed that both the maxillary and mandibular arch width was significantly lower in class-II division 1 groups(p<0.05). However, mandibular intercanine and interpremolar width were notstatistically different among all groups(p>0.05).The maxillary intermolar width showed highly significantly difference between class-III and class-II division 1groups and mandibular intermolar width are highly significant at 1% level between class-II and class-III groups and 5% level between class-Iand class-IIIgroups.
The arch widths of males were higher than females except the mandibular intercanine width in class-III and class-II division 1 groups. Arch form results revealed that the ovoid type was frequently distributed in class-I and class-III groups and tapered type in class-II division 1groups. No gender dimorphism was observed in arch form distribution.
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